Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Lee, Gwanjin | - |
dc.contributor.author | Jyothsna, Konkada Manattayil | - |
dc.contributor.author | Park, Jonghoo | - |
dc.contributor.author | Lee, JaeDong | - |
dc.contributor.author | Raghunathan, Varun | - |
dc.contributor.author | Kim, Hyunmin | - |
dc.date.accessioned | 2023-12-19T10:10:21Z | - |
dc.date.available | 2023-12-19T10:10:21Z | - |
dc.date.created | 2023-09-12 | - |
dc.date.issued | 2023-08 | - |
dc.identifier.issn | 2662-1991 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/46696 | - |
dc.description.abstract | Optical microscopy with optimal axial resolution is critical for precise visualization of two-dimensional flat-top structures. Here, we present sub-diffraction-limited ultrafast imaging of hexagonal boron nitride (hBN) nanosheets using a confocal focus-engineered coherent anti-Stokes Raman scattering (cFE-CARS) microscopic system. By incorporating a pinhole with a diameter of approximately 30μm, we effectively minimized the intensity of side lobes induced by circular partial pi-phase shift in the wavefront (diameter, d0) of the probe beam, as well as nonresonant background CARS intensities. Using axial-resolution-improved cFE-CARS (acFE-CARS), the achieved axial resolution is 350nm, exhibiting a 4.3-folded increase in the signal-to-noise ratio compared to the previous case with 0.58 d0 phase mask. This improvement can be accomplished by using a phase mask of 0.24 d0. Additionally, we employed nondegenerate phase matching with three temporally separable incident beams, which facilitated cross-sectional visualization of highly-sample-specific and vibration-sensitive signals in a pump-probe fashion with subpicosecond time resolution. Our observations reveal time-dependent CARS dephasing in hBN nanosheets, induced by Raman-free induction decay (0.66ps) in the 1373cm−1 mode. © 2023, Chinese Society for Optical Engineering. | - |
dc.language | English | - |
dc.publisher | Springer Nature | - |
dc.title | Confocal nonlinear optical imaging on hexagonal boron nitride nanosheets | - |
dc.type | Article | - |
dc.identifier.doi | 10.1186/s43074-023-00103-6 | - |
dc.identifier.scopusid | 2-s2.0-85168781818 | - |
dc.identifier.bibliographicCitation | PhotoniX, v.4, no.1 | - |
dc.description.isOpenAccess | TRUE | - |
dc.subject.keywordAuthor | Hexagonal boron nitride nanosheets | - |
dc.subject.keywordAuthor | Sub-diffraction-limited nonlinear optical microscopy | - |
dc.subject.keywordAuthor | Coherent anti-Stokes Raman spectroscopy | - |
dc.subject.keywordAuthor | 2D materials | - |
dc.subject.keywordAuthor | Ultrafast phonon dynamics | - |
dc.subject.keywordPlus | STOKES-RAMAN SCATTERING | - |
dc.subject.keywordPlus | SINGLE-PHOTON EMISSION | - |
dc.subject.keywordPlus | POINT-DEFECTS | - |
dc.subject.keywordPlus | GRAPHENE | - |
dc.subject.keywordPlus | SPECTROSCOPY | - |
dc.subject.keywordPlus | POLARITONS | - |
dc.subject.keywordPlus | MICROSCOPY | - |
dc.subject.keywordPlus | DYNAMICS | - |
dc.citation.number | 1 | - |
dc.citation.title | PhotoniX | - |
dc.citation.volume | 4 | - |